International Business Machines Corporation

Richard P Tarcza

Leslie W Wyman

Janet R Easton

Damian Leo Osisek

Angelo Macchiano

Gustav E Sittmann, Iii

William Alan Holder

Bruce H Ratcliff

Jerry Wayne Stevens

Bernd Nerz

Susan Marie Farrell

Mary Ellen Carollo

Brenton F Belmar

Alexandra Winter

Stephen R Valley

Patricia G Driever

Tan Lu

Dennis Ray Musselwhite

Frank W Brice

Gustav E Sittman, Iii

Lisa Cranton Heller

Geoffrey Owen Blandy

Constantinos Kassimis

Casper A Scalzi

Frank William Brice

Eugene P Hefferon

Gary Owen McAfee

Kimberly Tekavec Bailey

Francis Gassert

Dan Vangor

Forrest A Schumacher

Frederick C Wong

Margaret Dubowsky

Donald W Schmidt

Thomas Anthony Gregg

Mark S Farrell

David F Craddock

Waleri Fomin

Tracy Jo Adams

Steven Messinger

W Romney White

Gustav Sittmann

Jerry Stevens

Donald William Schmidt

Gustav Iii Sittmann

Gustav Sittmann Iii

Brenton Francois Belmar

Embodiments herein describe techniques for establishing data constructs for a data device that enable communication between a host and a shared adapter. A shared adapter facilitates communication with one or more hosts coupled to a NIC. To do so, a host can establish the data device in each operating system that wishes to communicate with the shared adapter. This can include establishing data constructs such as storage block pages, queue indexes, and interrupt registers in the host memory. The host can then transmit a queue description record (QDR) to the shared adapter so the adapter can configure the queues and has the addresses of the data constructs in the host memory.

Data constructs for a shared network adapter

The embodiments herein describe configuring a data device that enables communication between a host and a shared network adapter. The data device can include data connections between the host and the shared network adapter. The data device can have both control queues in a control plane and data queues in a data plane. The control queues can be activated first in order to issue control commands to configure the data plane in the shared network adapter.

Configuration of data connections between a host and a shared network adapter

Input/output (I/O) operation requests from pageable storage mode guests are interpreted without host intervention. In a pageable mode virtual environment, requests issued by pageable storage mode guests are processed by one or more processors of the environment absent intervention from one or more hosts of the environment. Processing of the requests includes manipulating, by at least one processor on behalf of the guests, buffer state information stored in host storage. The manipulating is performed via instructions initiated by the guests and processed by one or more of the processors.

Set buffer state instruction

A first component of a computing environment receives, from a physical network adapter of the computing environment, a request that the first component take over processing of network frames directed to network frame address(es) associated with a second component of the computing environment. The first component register the network frame address(es) for processing of network frames directed to the network frame address(es). Based on the first component receiving from the physical network adapter a network frame directed to a network frame address of the network frame address(es) associated with the second component, the first component processes the received network frame, in which the network frame is provided to the second component via an inter-component link between the first component and the second component.

Take-over of network frame handling in a computing environment

Interpreting I/O operation requests from pageable guests without host intervention

Virtual switches are established in a host system of a computing environment. Each virtual switch of the virtual switches includes a respective virtual switch port grouped within a shared port group of virtual switch ports. The virtual switch ports of the shared port group are in communication with a common physical network adapter of the host system. The virtual switch ports of the shared port group share a single physical port of the physical network adapter as part of a common physical link aggregation group (LAG).

Physical port sharing in a link aggregation group

A data connection of a shared resource is placed in isolation mode to remove its ability to communicate with other data connections of the shared resource. This ability to isolate the data connection is dynamic in that it can be turned on/off at any time. This provides increased data security for the entities using the data connection.

Data isolation in shared resource environments

A Hardware Management Console (HMC) configures virtual networks. The HMC extends Internal Queued Direct I/O to an intra-ensemble data network (IEDN) within a cluster of virtual servers to define a single channel path identifier, and to define a channel parameter. The HMC defines at least one virtual network. The HMC defines a bridge port within each CPC that supports at least one of the virtual servers. The HMC defines a network interface for each virtual server within each cluster. The HMC grants access to a corresponding virtual network for each virtual server.

Virtual network configuration and management

Host page management assist functions are employed to manage storage of a pageable mode virtual environment. These functions enable storage to be managed by a processor of the environment absent intervention of a host of the environment. The functions include a resolve host page function; a pin function; and unpin functions.

Facilitating management of storage of a pageable mode virtual environment absent intervention of a host of the environment

Automatically converting a synchronous data transfer to an asynchronous data transfer. Data to be transferred from a sender to a receiver is initiated using a synchronous data transfer protocol. Responsive to a determination that the data is to be sent asynchronously, the data transfer is automatically converted from the synchronous data transfer to the asynchronous data transfer.

Facilitating communication between isolated memory spaces of a communications environment

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Kingston, NY, United States of America

Richard P Tarcza